[Jewelry making - Article 00013] - [Orchid] Water glass

[Marilyn M. Smith]

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    browsed through a book today that I hadn't looked at for a long time.
    It's "Indian Jewelry Making" vol. 2 by Oscar T. Branson, copyright
    1979. It has a section about cuttlebone casting. Before pouring the
    metal, the interior of the cuttlebone was coated with a thin solution
    of borax, water glass and water. The photographs showed the
    difference between using this mixture and not. It seemed to really
    preserve the mold through more than one pour. I have no idea of what
    water glass is. I know that it used to be used to preserve eggs
    before refrigeration and that 's it. I have seen it on drugstore
    shelves in the distant past. I wonder if there are harmful fumes
    released when it is heated? John, how about an answer? 

Marilyn Smith

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